STUDY OF RADIO FREQUENCY DRYING OF PADDY GRAIN

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dc.contributor.advisorDr. D. D. SMITH
dc.contributor.authorEr. S. SRIKANTH
dc.date.accessioned2017-10-16T08:51:19Z
dc.date.available2017-10-16T08:51:19Z
dc.date.issued2015
dc.descriptionD5215en_US
dc.description.abstractThe drying characteristics of a paddy grain (NLR 33 892) were studied using Radio Frequency Dryer (RFD). The drying chamber of the RFD consisted pair of electrodes of size 75 cm X 55 cm and a grain holding cell of 36 L X 25.5 W X 5.5 H, cm3. The cell was filled with grain for three levels of bed thickness (2, 3 and 4 cm) to study the drying and drying rate curves. The weight of the drying grain was recorded at every 1 min interval to calculate the moisture loss. The obtained data was plotted and analyzed for moisture loss and drying rate. It was observed that the drying curve followed the falling rate period for all the bed thickness experiments conducted in Radio Frequency drying. The longest time of drying 9 min was observed in the experiment where the grain bed thickness was 3 cm whereas the shortest time of drying 6 min was observed in the experiment where the grain bed thickness was 4 cm. It was also found that the drying rates were decreased along with the drying bed thickness. The milling and cooking quality characteristics of Radio Frequency dried paddy were studied as affected by the drying bed thickness at four levels (2.00, 3.00 and 4.00 cm). The milling of rice was evaluated using the combined huller cum sheller based on the percentage of milled rice, head rice and broken rice. Similarly, the quality of cooking of rice of RF dried paddy were evaluated in terms of minimum cooking time, viii water uptake ratio, grain elongation ratio and volume expansion ratio in percentage. The milling percentages of RF dried paddy found were 78.89%, 77.06% and 76.32% at 2, 3 and 4 cm thick grain bed in RF drying. The average milled rice quantity of sun dried paddy found was 79.19 g and its milling efficiency was 79.19%. In comparison, the highest milling efficiency found was 79.19% in sun dried and the lowest milling efficiency found was 76.32% at 4 cm thick bed in RF dried. The head rice yield was found to be 35.90, 48.06, 61.17 and 27.79% for the grain dried at 2, 3, 4 cm bed thickness in RF and sun dried paddy, respectively. The broken rice recorded 42.99, 29.00, 15.16 and 51.40% for the grain dried at 2, 3, 4 cm bed thickness in RF and sun dried. The water uptake ratio varied from 3.54, 3.54, 3.54 and 3.38 for the grain dried at 2, 3 and 4 cm bed thickness in RF and sun dried paddy, respectively. The grain elongation ratio was found to be 1.68, 1.67, 1.66 and 1.76 for the grain dried at 2, 3, 4 cm bed thickness in RF and sun dried paddy. The volume expansion results found in Radio Frequency dried were 4.63, 4.76 and 4.89 whereas in sun dried was 4.32. Among all the grain bed thickness investigated, the 2 cm thick bed yielded better results in terms of less brokens and more head rice when compared to 3 and 4 cm thick beds dried under RFD. Key Words: Radio Frequency dying; Drying curve; Drying rate; Paddy; Milling; Cooking.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810033168
dc.keywordsSTUDY OF RADIO FREQUENCY DRYING OF PADDY GRAINen_US
dc.language.isoen_USen_US
dc.pages57en_US
dc.publisherAcharya N.G. Ranga Agricultural University, Gunturen_US
dc.research.problemSTUDY OF RADIO FREQUENCY DRYING OF PADDY GRAINen_US
dc.subProcessing and Food Engineeringen_US
dc.subjectnullen_US
dc.themeSTUDY OF RADIO FREQUENCY DRYING OF PADDY GRAINen_US
dc.these.typeM.Techen_US
dc.titleSTUDY OF RADIO FREQUENCY DRYING OF PADDY GRAINen_US
dc.typeThesisen_US
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